I agree generally that for Canadian pairs, there will be a climb internationally. It is early yet, but Kirsten/Michael aren't showing the spark they had two seasons ago. It could just be a bit of a lull, and they will be picking things up and showing more progress. Last season, they had to battle a slow start due to injuries at the same time as trying to fulfill expectations as Canada's top team. It was a bit of a tall order when what they probably needed was slow and steady behind an established team they could measure themselves and push themselves against, as they were used to doing when D/R were at the top.
K&M didn't have as good programs last season, as they did the previous season, so coupled with the expectations being high, it seems a bit like they actually lost some momentum, despite the thrill ride at 4CCs. S/H were shaky in coming back from injury at 4CCs. So with the opportunity for victory in front of K&M, their ambitious yet jittery performance in the 4CCs fp speaks volumes about the fact this past season for them wound up a bit like 'reach exceeding their grasp.' They are a good team, but they are still working out their style and trying to solidify their confidence. Michael still has some partnership skills to shore up as well. And now they will also be adjusting to a new training camp. I think the key for them is going to be finding the right type of programs (as they had two seasons ago) to re-kickstart their momentum.
All-in-all, Canada may have the political clout, and a bit better legacy results in recent years in pairs, but right now U.S. pairs is on the upswing advantage with a number of veteran teams, and a number of exciting up-and-coming new teams. Still, that's an on-paper observation, while the proof of the pudding takes place on the ice, complicated by figure skating being so full of politics and rep-based scoring.